MCCB for main feeder or large branch — 50 A continuous, 4-pole, with shunt trip
The Siemens 3VA1050-4ED42-0HA0 is a SENTRON molded case circuit breaker rated for 50 A continuous current at 40 °C, with a 4-pole configuration and a TM210 thermal-magnetic overcurrent release. It carries a 121 kA interrupting rating at 240 V and 75.6 kA at 415 V, making it suitable for high-fault-capacity main feeders or large branch circuits in industrial switchboards and panelboards.
The 121 kA interrupting rating at 240 V and 75.6 kA at 415 V give this MCCB headroom for high-fault installations where upstream transformer capacity is large. The TM210 release holds 50 A continuously from 40 °C up to 50 °C; above that it derates to 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. For a panel running at 55 °C ambient, the effective continuous rating is 48 A, not the nameplate 50 A.
Shunt trip included — no auxiliary contacts, no communication
It does not include undervoltage release, auxiliary contacts, phase failure detection, ground fault monitoring, or communication functions. The N-conductor protection is also omitted. For applications requiring remote status feedback or ground fault protection, a different 3VA variant or an add-on accessory kit is needed.
Lifecycle and sourcing — current production, quoted to order
No official successor has been announced; the 3VA family remains the active SENTRON platform for molded case breakers.